Safety-vent.



To all 'whom'tima camera: r

Be itgkiicwn-r t at I, MARSHALL Hanes PAGn,-a citizenl of th'e'United States, residing sions Ain l'receptaclesajforj'containin 1 ga'so ene- #It is well'knowiithatwith such substances as gasoleneland falldohblbenzini'and the vllike that the vapors beingfcontinuallyt given i off soon producefsuch'g-amixture-with the air nearv `,the gasoleneLl'tankff'as tofc'ause'bad. ex-. plosions, and'whenthe'ltank is not provided with some means f Ifor preventing )its utter demolition thee'xplosionof the tankvspreads explosion takes fplace'.

the v re all over the building* -the An object-'of this i ventioii 'isfto Trovi-de a1 to' hold" device which'v willbe strong enou v the inflammable liquidin the tan andl yet weakfenoughto open suiiiciently to prevent` abad explosion,land which will'prevent the tire from gainin'gaccess tothe'main body of4 fiuid in the'tank. l i

In the 4 drawings, in which the same numeral of reference is applied to the same portion throughout, Figure 1 is a vertical elevation of the device ready for securingto al gasolene Or-.Othe'r fueltaiik Fig. 2is a vertical sectional view ofthe device, only a portion of the-perforation?. in the lowertube eing shown., Fig. 3 is a sectional viewof the,... tube closure, Fig. is a sectional view of"v the tube top, Fig. 5 l1 s la'sectional .view of theA tube'collar, and Fi ,t5-and 7 are views of the screens used in-t ie'tubeclosure The devicelis intended tobe secured in the openin ein ltheftop of 'a asolene tank throng which the" gasolene is fed tolthe tank', thescrew collar lholdingthe'safety vent in its place. -The tube top 2 has a lon tube like screen?, secured' to. itby means o the three rivetsi, only ,two of said rivets showing in Fig. .2, and one in Fig. 1. This tube is of such size and has enough holes in it to permit all the glasolene which may be poured through the ole in the top 2 to at vspecification':if Letters' s with the artthat itiisnecessary to Ilerietanks through some -such openin as is here provided,aiid theA` screen 3 vis or the ving of the'gasfo'rlthe" "sure at -allitii'nes5iffthe feed is o Vand theldisk s,

once'passoutinto the f -The topw2 is threaded'bothjinternallyfand externally,''the outer-threads `.beilrig-for .the purpose of: carrying-L theifcollar g1,.- and the "innerjsetof threads forthe'fpurpose of holding thevent closure 5.3: c v t willibe-.understoodhythose familiar gasourpose ofpreventing the-veryA rapid burnrebable explosion of the asolene -tanks h'ou d Vithappen'fthat the gaso enei'lshoiildflbe fired 1 during? the time the tanl'r' lis' beingiilled.- Itfwillgalsq be understoodflbv those-familiar with the `art tliat.-, the 4gasol'ene or otherliquidhfl'lel in the tank y"mustbe' underfthe' atmospheric presthe gravity system', and thenv ther-opening must not be A so eat as theopeiiin necessary for filling the -tz'ijnk,"l for-'fthe .doub e reasongthat va smaller v opening is.v all thatf-islrequired and that a v.large ,opening makesjthefdanger -from yfire great'ig: thai'iywitli'garjsmall opening. v. This closure i'sjintended-rtd' permit ,the access of suiiicientairfto allow-.the proper feeding of the gasolene and at the same time to prevent thel f waste of j gasolene by having Ithe `tank vex'posed'f to thefa'ir over .too greatan area.

The-closurelis threaded externally for the urpose'of1 securing'it in the top 2, and it ias a' passage entirely through it, said assage being partially. closedby means o an annular washer 6 seated on a screen7 pressed into the passage at the. base of the closure M aving a hole therein, secure iii the-topof the closureby means of a fusible -nietal,';i`saidlfusible metalbeing thickened on onefside for theupurp'oseof' causing the washerto Vhold'lon one-'side for preventing itl from' blowing bodlyaway from the tank,

orcausinv it to lift o rather than blow off.;`V UndDer .the disk3 8 is -another screen which is simply l ressed' intoplace, the shoulder ontheun er-'side of the top of the closure preventin thelscreen 9, from being blownfoutzwhen t e disk-8 blows oi.

B fvThe, operation of the device is' as follows: 'lflie tan beingfilled-fwitli gasolene at the timefa tire breaks outv near it, the heat will cause more or less of the gasolen'e to vaporize and oncoming from the'vent of the tank it will ignite at once, but since the screens prevent the fire from actually flashing back into p ses: jrafecedeaw, Application med December 1,6,".1-908L8erie1 No.v ifbliff' i great enough the disk 8 will-have its fusiblev the tank the tire burns steadily at the mouth.4

of the tank, but should the heat become metal melted and-it "will turn over to one side becausejof the considerable ressure wthinthegasolene tank and the re will simply continue to burn, the two vscreens 7i and 9 coolin the flame enou h to ignition of t e'entire'tank o gaso ene 'at one time. The purpose of the up er set of screens is to prevent backring o the tank when it might happen to be full'to a point above'the bottom ofthe tube, the twotop screens preventing the fire from reaching the top -of the are preventedl rom'being blown out of the to closure by the shoulders thereon.

aving thus described my invention what I claim as new and desire to secure by Let ers Patent of the United States is as fo1 ows:

1.V In a safety vent for fuel tanks, a collar adapted to be secured to the top of the tank, a screen tube riveted to the collar, a plug having a passage therethrough, said passage being obstructed by means of an annular disk having a fusible metal ring thicker at one part than at others to secure the disk to the plug, and a pair of screens placed at a distance from each other.

reventv ...3. Inasa asolene and the two screensi 2. AIna safety vent for fuel' tanks, the com- '.,bination of a collar adapted to be secured to `a tank, ascreen tube secured to the colla'f a ar plig adapted to be screwedinto the co an having a passage' therethrough, sind passage yobstructed by twoannular rings one of which is secured to the plu .by means of a fusible metal, said metal ein thicker at one place than at all others an two screens placed closely adjacent their respective rings.

y ety -vent forv fuel tanks, the com binationofja'collar adaptedtol be secured to a tank, a screen tube secured to the collar, a plug having a passage therethrough, an annular ring placed inv said passage at the inner end of the plug, two screens placed in said passage, means to prevent the screens from being forced out of the passage, and a second annular ring secured in the outer end of the lug by means of a fusible metal said metal eing thicker on one side of the plug than on the other side.

In testimony whereofl have set my hand this 3rd day of December A. D. 1908, in the presence of the two subscribed witnesses.

MARSHALL HEDGE PAGE Witnesses:

J AMES B. FORBES, Gao. W. BRADFORD. 

